@media screen and (min-width: 750px) {
    html {
        font-size: 75px !important;
    }
}

body {
    min-width: 320px;
    width: 10rem;
    max-width: 750px;
    margin: 0 auto;
    line-height: 1.5;
    font-family: Arial, Helvetica, sans-serif;
    background-color: #fff;
}

h1, h2, h3, h4, h5, h6, p {
    margin: 0;
    padding: 0;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

div {
    box-sizing: border-box;
}

.footer {
    position: fixed;
    display: flex;
    justify-content: space-around;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2rem;

    padding-top: .1rem;
    background-color: #f7f7f7;
}

.footer a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer a img {
    width: .8rem;
    height: 1rem;
}

.footer a span {
    font-size: .3733rem;
    color: #3e3e3e;
}